Upon returning from overseas vacation, what is the nurse's priority for a client with signs of a helminth infection?

The priority for a client suspected of having a helminth infection, particularly after international travel, is to obtain a stool sample for ova and parasites. This step is critical because it allows for the definitive diagnosis of the specific type of helminth infection present. Identifying the parasite is essential for determining the appropriate anthelmintic treatment, as different helminths require different medications for effective treatment.

While pain relief and other supportive measures may be important in managing symptoms, they do not address the underlying cause of the infection. Over-the-counter remedies might not be effective against helminth infections and could delay patients from receiving the necessary prescription treatment. Dietary recommendations may also be useful after diagnosis, but they do not facilitate the identification or treatment of a helminth infection directly. Therefore, obtaining a stool sample is the most immediate and critical action the nurse should take to ensure proper diagnosis and timely management of the condition.